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Video coding

a video and coding technology, applied in the field of video coding, can solve problems such as sharp natural pictures, and achieve the effect of sharp natural pictures

Active Publication Date: 2011-08-23
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a method and device for compressing video using picture content parameters. It uses these parameters to enhance the output video and compare it with the input video. The enhancement control parameters are calculated to minimize the difference between the two. This results in sharp and natural pictures. The technical effect of this invention is improved video compression with improved quality.

Problems solved by technology

This prevents the enhancement from being overdone and results in sharp natural pictures.

Method used

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Embodiment Construction

[0018]According to one embodiment of the invention, a spatial scalable compression scheme using spatial sharpness enhancement techniques is disclosed. In this embodiment of the invention, picture content information is extracted from both the reference signal and the enhanced output signal as will be described below.

[0019]This embodiment will now be described in more detail with reference to FIG. 2 which is a block diagram of an encoder which can be used with the invention. It will be understood that the encoder can be a layered encoder with a base layer having a relatively low resolution and at least one enhancement layer, but the invention is not limited thereto. The depicted encoding system 200 accomplishes layer compression, whereby a portion of the channel is used for providing a low resolution base layer and the remaining portion is used for transmitting edge enhancement information, whereby the two signals may be recombined to bring the system up to high-resolution. The high ...

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PUM

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Abstract

A method and apparatus for encoding an input video bitstream to produce an encoded output bitstream is disclosed. A base stream is enhanced based on enhancement control parameters. At least one picture content parameter is extracted from the enhanced base stream. At least one picture content parameter is extracted from the input video bitstream. The enhanced picture content parameters are compared with the input picture content parameters. An output from the comparison step is received and the enhancement control parameters are calculated so as to minimize the difference between the input picture content parameters and the enhanced picture content parameters. The calculated control parameters are incorporated into the encoded output bitstream.

Description

FIELD OF THE INVENTION[0001]The invention relates to video coding, and more particularly to spatial scalable video compression schemes.BACKGROUND OF THE INVENTION[0002]Because of the massive amounts of data inherent in digital video, the transmission of full-motion, high-definition digital video signals is a significant problem in the development of high-definition television. More particularly, each digital image frame is a still image formed from an array of pixels according to the display resolution of a particular system. As a result, the amounts of raw digital information included in high-resolution video sequences are massive. In order to reduce the amount of data that must be sent, compression schemes are used to compress the data. Various video compression standards or processes have been established, including, MPEG-2, MPEG-4, and H.264.[0003]Many applications are enabled where video is available at various resolutions and / or qualities in one stream. Methods to accomplish t...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H04N7/18H04N7/26H04N7/30H04N7/46
CPCH04N19/46H04N19/59H04N19/33
Inventor BRULS, WILHELMUS HENDRIKUS ALFONSUS
Owner KONINK PHILIPS ELECTRONICS NV